F 550 4WD Super Duty V10-6.8L (2009)
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Is the resistance less than 5 ohms?
Yes
GO to T11.
No
GO to T10.
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T10 CHECK THE HS-CAN CIRCUITS FOR AN OPEN AT THE DLC
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Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness
side.
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Is the resistance greater than 10,000 ohms?
Yes
REPAIR the DLC or REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan
tool.
No
A capacitor internal to a module may still be draining causing irregular resistance readings. WAIT 5 minutes. REPEAT the pinpoint test.
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T11 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE PCM DISCONNECTED
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Disconnect: PCM C175b (Gasoline Engine) or C1232b (Diesel Engine).
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Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness
side.
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Is the resistance less than 5 ohms?
Yes
GO to T12.
No
CONNECT the negative battery cable. GO to T31.
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T12 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE ABS MODULE DISCONNECTED
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Disconnect: ABS Module C135.
